Robosoft Software Developer Interview Questions and Answers

Round duration - 60 Minutes
Round difficulty - Easy

4 Questions which were of Easy, Medium, and Hard level.

Q1. 
Lowest Common Ancestor of a Binary Tree III
The structure of a binary tree has been modified so that each node includes a reference to its parent node.
Problem Statement
You are provided with two nodes,...read more
Ans. 
This question is about finding the lowest common ancestor of two nodes in a binary tree with parent references.
• Traverse from the given nodes to their respective root nodes and store the paths in two separate lists.

• Compare the two lists and find the last common node.

• Return the last common node as the lowest common ancestor.
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Q2. 
Maximum Subarray Problem Statement
Ninja has been given an array, and he wants to find a subarray such that the sum of all elements in the subarray is maximum.
A subarray 'A' is considered greater than a...read more
Ans. 
The problem is to find a subarray with the maximum sum in a given array.
• Iterate through the array and keep track of the maximum sum and the current sum.

• If the current sum becomes negative, reset it to 0.

• Update the maximum sum if the current sum is greater.

• Also keep track of the start and end indices of the subarray with the maximum sum.

• Return the subarray using the start and end indices.
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Round duration - 50 Minutes
Round difficulty - Easy

Q1. 
Next Greater Element Problem Statement
Given a list of integers of size N, your task is to determine the Next Greater Element (NGE) for every element. The Next Greater Element for an element X is the firs...read more
Ans. 
The task is to find the next greater element for each element in an array.
• Iterate through the array from right to left.

• Use a stack to keep track of the elements that have a greater element to their right.

• For each element, pop elements from the stack until a greater element is found or the stack is empty.

• If a greater element is found, it is the next greater element for the current element.

• If the stack becomes empty, the...read more
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Q2. 
Trapping Rain Water Problem Statement
You are given a long type array/list ARR of size N, representing an elevation map. The value ARR[i] denotes the elevation of the ith bar. Your task is to determine th...read more
Ans. 
The question asks to find the total amount of rainwater that can be trapped in the given elevation map.
• Iterate through the array and find the maximum height on the left and right side of each bar.

• Calculate the amount of water that can be trapped at each bar by taking the minimum of the maximum heights on both sides and subtracting the height of the bar.

• Sum up the amount of water trapped at each bar to get the total amo...read more
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Round duration - 30 Minutes
Round difficulty - Easy

It is just a formality round, asked basic questions like relocation and joining date etc

Q1. What is bundling
Ans. 
Bundling is the process of combining multiple files or resources into a single file for more efficient delivery.
• Bundling helps reduce the number of HTTP requests needed to load a web page.

• It can improve performance by reducing latency and bandwidth usage.

• Common tools for bundling in web development include Webpack and Parcel.
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Q2. What is minification
Ans. 
Minification is the process of removing unnecessary characters from code without affecting its functionality.
• Minification reduces file size by removing comments, whitespace, and renaming variables.

• It helps improve website loading speed and performance.

• Example: Minified JavaScript code: var x=document.getElementById('demo');x.innerHTML='Hello World';
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It was basic test of maths and aptitude.

This has basic coding such as fibonacci series, problem solving, stack, queue

Q1. Tell me about yourself was first question, then carry on with your project showcase
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Q1. Introducing yourself...
Ans. Hello let me start by thanking you for this opportunity .. My name is Urvashi Chauhan I am From jansath muzaffarnagar . My father's name is mr omveer Singh . He is a farmer and my mother name is ms babita Devi . She is a housewife. I completed my 10 , 12 both are same college that's name Gomti kanya inter college jansath muzaffarnagar. I got 80 % in 10 and 65 % in 12. Currently I completed I BTech by CSE From s D colle...read more
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Q2. What is your strength
Ans. My strength is that my family supporting me..
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Q3. What's your weeknees
Ans. My weakness is that lest i fail
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Q4. What's the field that you have interested?
Ans. Web designing..
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Average type of questions

Q1. They were very friendly
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Q2. Where do you see yourself in 5 years
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Basic apt, advanced apt - 90 min

Q1. What is Maven? where it used ? what it use case ?
Ans. 
Maven is a build automation tool used primarily for Java projects to manage dependencies, build processes, and project documentation.
• Maven is used to manage project dependencies by automatically downloading required libraries from repositories.

• It simplifies the build process by providing a standard way to build, test, and package projects.

• Maven uses a project object model (POM) file to define project structure, depende...read more
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Q2. Spring (again based on the resume)
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Q3. Simple Java Program?
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Q4. JDBC ? HOW WE USE IT ?
Ans. 
JDBC is a Java API for connecting and executing SQL queries on a database.
• JDBC stands for Java Database Connectivity.

• It allows Java programs to interact with databases.

• We use JDBC by loading the driver, establishing a connection, creating a statement, executing queries, and handling results.

• Example: Class.forName("com.mysql.jdbc.Driver"); Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/databas...read more
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